1 //===-- TargetLibraryInfo.cpp - Runtime library information ----------------==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the TargetLibraryInfo class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Target/TargetLibraryInfo.h"
15 #include "llvm/ADT/Triple.h"
18 // Register the default implementation.
19 INITIALIZE_PASS(TargetLibraryInfo, "targetlibinfo",
20 "Target Library Information", false, true)
21 char TargetLibraryInfo::ID = 0;
23 void TargetLibraryInfo::anchor() { }
25 const char* TargetLibraryInfo::StandardNames[LibFunc::NumLibFuncs] =
29 "__cxa_guard_acquire",
30 "__cxa_guard_release",
140 /// initialize - Initialize the set of available library functions based on the
141 /// specified target triple. This should be carefully written so that a missing
142 /// target triple gets a sane set of defaults.
143 static void initialize(TargetLibraryInfo &TLI, const Triple &T,
144 const char **StandardNames) {
145 initializeTargetLibraryInfoPass(*PassRegistry::getPassRegistry());
148 // Verify that the StandardNames array is in alphabetical order.
149 for (unsigned F = 1; F < LibFunc::NumLibFuncs; ++F) {
150 if (strcmp(StandardNames[F-1], StandardNames[F]) >= 0)
151 llvm_unreachable("TargetLibraryInfo function names must be sorted");
155 // memset_pattern16 is only available on iOS 3.0 and Mac OS/X 10.5 and later.
157 if (T.isMacOSXVersionLT(10, 5))
158 TLI.setUnavailable(LibFunc::memset_pattern16);
159 } else if (T.getOS() == Triple::IOS) {
160 if (T.isOSVersionLT(3, 0))
161 TLI.setUnavailable(LibFunc::memset_pattern16);
163 TLI.setUnavailable(LibFunc::memset_pattern16);
166 if (T.isMacOSX() && T.getArch() == Triple::x86 &&
167 !T.isMacOSXVersionLT(10, 7)) {
168 // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
169 // we don't care about) have two versions; on recent OSX, the one we want
170 // has a $UNIX2003 suffix. The two implementations are identical except
171 // for the return value in some edge cases. However, we don't want to
172 // generate code that depends on the old symbols.
173 TLI.setAvailableWithName(LibFunc::fwrite, "fwrite$UNIX2003");
174 TLI.setAvailableWithName(LibFunc::fputs, "fputs$UNIX2003");
177 // iprintf and friends are only available on XCore and TCE.
178 if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce) {
179 TLI.setUnavailable(LibFunc::iprintf);
180 TLI.setUnavailable(LibFunc::siprintf);
181 TLI.setUnavailable(LibFunc::fiprintf);
184 if (T.getOS() == Triple::Win32) {
185 // Win32 does not support long double
186 TLI.setUnavailable(LibFunc::acosl);
187 TLI.setUnavailable(LibFunc::asinl);
188 TLI.setUnavailable(LibFunc::atanl);
189 TLI.setUnavailable(LibFunc::atan2l);
190 TLI.setUnavailable(LibFunc::ceill);
191 TLI.setUnavailable(LibFunc::copysignl);
192 TLI.setUnavailable(LibFunc::cosl);
193 TLI.setUnavailable(LibFunc::coshl);
194 TLI.setUnavailable(LibFunc::expl);
195 TLI.setUnavailable(LibFunc::fabsf); // Win32 and Win64 both lack fabsf
196 TLI.setUnavailable(LibFunc::fabsl);
197 TLI.setUnavailable(LibFunc::floorl);
198 TLI.setUnavailable(LibFunc::fmodl);
199 TLI.setUnavailable(LibFunc::logl);
200 TLI.setUnavailable(LibFunc::powl);
201 TLI.setUnavailable(LibFunc::sinl);
202 TLI.setUnavailable(LibFunc::sinhl);
203 TLI.setUnavailable(LibFunc::sqrtl);
204 TLI.setUnavailable(LibFunc::tanl);
205 TLI.setUnavailable(LibFunc::tanhl);
207 // Win32 only has C89 math
208 TLI.setUnavailable(LibFunc::exp2);
209 TLI.setUnavailable(LibFunc::exp2f);
210 TLI.setUnavailable(LibFunc::exp2l);
211 TLI.setUnavailable(LibFunc::expm1);
212 TLI.setUnavailable(LibFunc::expm1f);
213 TLI.setUnavailable(LibFunc::expm1l);
214 TLI.setUnavailable(LibFunc::log2);
215 TLI.setUnavailable(LibFunc::log2f);
216 TLI.setUnavailable(LibFunc::log2l);
217 TLI.setUnavailable(LibFunc::log1p);
218 TLI.setUnavailable(LibFunc::log1pf);
219 TLI.setUnavailable(LibFunc::log1pl);
220 TLI.setUnavailable(LibFunc::nearbyint);
221 TLI.setUnavailable(LibFunc::nearbyintf);
222 TLI.setUnavailable(LibFunc::nearbyintl);
223 TLI.setUnavailable(LibFunc::rint);
224 TLI.setUnavailable(LibFunc::rintf);
225 TLI.setUnavailable(LibFunc::rintl);
226 TLI.setUnavailable(LibFunc::round);
227 TLI.setUnavailable(LibFunc::roundf);
228 TLI.setUnavailable(LibFunc::roundl);
229 TLI.setUnavailable(LibFunc::trunc);
230 TLI.setUnavailable(LibFunc::truncf);
231 TLI.setUnavailable(LibFunc::truncl);
233 // Win32 provides some C99 math with mangled names
234 TLI.setAvailableWithName(LibFunc::copysign, "_copysign");
236 if (T.getArch() == Triple::x86) {
237 // Win32 on x86 implements single-precision math functions as macros
238 TLI.setUnavailable(LibFunc::acosf);
239 TLI.setUnavailable(LibFunc::asinf);
240 TLI.setUnavailable(LibFunc::atanf);
241 TLI.setUnavailable(LibFunc::atan2f);
242 TLI.setUnavailable(LibFunc::ceilf);
243 TLI.setUnavailable(LibFunc::copysignf);
244 TLI.setUnavailable(LibFunc::cosf);
245 TLI.setUnavailable(LibFunc::coshf);
246 TLI.setUnavailable(LibFunc::expf);
247 TLI.setUnavailable(LibFunc::floorf);
248 TLI.setUnavailable(LibFunc::fmodf);
249 TLI.setUnavailable(LibFunc::logf);
250 TLI.setUnavailable(LibFunc::powf);
251 TLI.setUnavailable(LibFunc::sinf);
252 TLI.setUnavailable(LibFunc::sinhf);
253 TLI.setUnavailable(LibFunc::sqrtf);
254 TLI.setUnavailable(LibFunc::tanf);
255 TLI.setUnavailable(LibFunc::tanhf);
261 TargetLibraryInfo::TargetLibraryInfo() : ImmutablePass(ID) {
262 // Default to everything being available.
263 memset(AvailableArray, -1, sizeof(AvailableArray));
265 initialize(*this, Triple(), StandardNames);
268 TargetLibraryInfo::TargetLibraryInfo(const Triple &T) : ImmutablePass(ID) {
269 // Default to everything being available.
270 memset(AvailableArray, -1, sizeof(AvailableArray));
272 initialize(*this, T, StandardNames);
275 TargetLibraryInfo::TargetLibraryInfo(const TargetLibraryInfo &TLI)
276 : ImmutablePass(ID) {
277 memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
278 CustomNames = TLI.CustomNames;
281 bool TargetLibraryInfo::getLibFunc(StringRef funcName,
282 LibFunc::Func &F) const {
283 const char **Start = &StandardNames[0];
284 const char **End = &StandardNames[LibFunc::NumLibFuncs];
285 const char **I = std::lower_bound(Start, End, funcName);
286 if (I != End && *I == funcName) {
287 F = (LibFunc::Func)(I - Start);
293 /// disableAllFunctions - This disables all builtins, which is used for options
294 /// like -fno-builtin.
295 void TargetLibraryInfo::disableAllFunctions() {
296 memset(AvailableArray, 0, sizeof(AvailableArray));